MATLAB: How to solve this error

how to solve this error

hello all, i have this error with this code
Undefined function 'eq' for input arguments of type 'cell'.
Error in e_extructing (line 107)
if(Ex_domain(loop7_out)=='hotmail.com')
    Ex_domain =regexp(k2, '(?<=@).+$', 'match' )
  for loop7_out=1:length(Ex_domain)
  if(Ex_domain(loop7_out)=='hotmail.com')
   Ex_Z(loop7_out)=0
   elseif(Ex_domain{loop7_out}=='gmail.com')
       Ex_Z(loop7_out)=1
      elseif(Ex_domain{loop7_out}=='yahoo.com')
           Ex_Z(loop7_out)=2
      elseif(Ex_domain{loop7_out}=='mail.com')
            Ex_Z(loop7_out)=3
       elseif(Ex_domain{loop7_out}=='live.com')
            Ex_Z(loop7_out)=4
            elseif(Ex_domain{loop7_out}=='msn.com')
            Ex_Z(loop7_out)=5
            elseif(Ex_domain{loop7_out}=='myspace.com')
            Ex_Z(loop7_out)=6
            elseif(Ex_domain{loop7_out}=='mynet.com')
            Ex_Z(loop7_out)=7
end
end

Best Answer

Unfortunately, you can't use == when comparing strings. Replace
Ex_domain(loop7_out)=='hotmail.com'
and all the similar logical checks with
strcmpi(Ex_domain(loop7_out),'hotmail.com')
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